Add files, first commitHEADmain

1 files changed, 103 insertions, 0 deletions

diff --git a/ft_getline.c b/ft_getline.c
new file mode 100644
index 0000000..400a23e
--- /dev/null
+++ b/ft_getline.c
@@ -0,0 +1,103 @@
+/*
+ft_getline Copyright (C) 2026 yctct
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+
+#include "ft_getline.h"
+
+char	*read_file(int fd, char *buf, char *line, char *stash)
+{
+	ssize_t	bytes_read;
+
+	bytes_read = read(fd, buf, BUFFER_SIZE);
+	if (bytes_read < 0)
+	{
+		free(line);
+		return (NULL);
+	}
+	buf[bytes_read] = 0;
+	if (bytes_read == 0)
+	{
+		if (line[0] != 0)
+		{
+			stash[0] = 0;
+			return (line);
+		}
+		else
+		{
+			free(line);
+			return (NULL);
+		}
+	}
+	return (buf);
+}
+
+
+
+char	*eol_is_in_line(char *pivot, char *stash, char *line)
+{
+	int		i;
+	int		j;
+	char	*tmp;
+
+	i = 1;
+	j = 0;
+	while (pivot[i] != 0)
+		stash[j++] = pivot[i++];
+	stash[j] = 0;
+	pivot[1] = 0;
+	tmp = line;
+	line = ft_strdup(line); 
+	free(tmp);
+	return (line);
+}
+
+char	*keep_reading(int fd, char *pivot, char *stash, char *line)
+{
+	char		buf[BUFFER_SIZE + 1];
+
+	while (read_file(fd, buf, line, stash) != 0)
+	{
+		line = ft_strjoin(line, buf);
+		if (!line)
+			return (NULL);
+		pivot = ft_strchr(line, EOL);
+		if (pivot != 0)
+			return (eol_is_in_line(pivot, stash, line));
+		else if (buf[0] == 0) 
+			return (line);
+	}
+	return (NULL);
+}
+
+char	*ft_getline(int fd)
+{
+	char		*line;
+	static char	stash[BUFFER_SIZE] = "\0";
+	char		*pivot;
+
+	if ((fd < -1) || (fd > 1024))
+		return (NULL);
+	line = ft_strdup(stash);
+	if (!line)
+		return (NULL);
+	pivot = ft_strchr(line, EOL);
+	if (pivot != 0)
+		return (eol_is_in_line(pivot, stash, line));
+	else
+		return (keep_reading(fd, pivot, stash, line));
+	return (NULL);
+}